The court by warrant may direct any officer authorized by law to bring the child forthwith before the court for the hearing of the motion if the court finds from affidavit, written statements signed under penalty of perjury pursuant to Minnesota Statutes section 358.116, or testimony that:
In any case, the court may issue a summons instead of a warrant to secure the appearance of the child at the hearing.
Minn. R. Juv. P. 14.05